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Peter Snow’s online swingometer is a rough guide to what happens when the vote shifts from one party to another at a general election.
To find out about a swing percentage, the user clicks and drag the slider along the numbered scale underneath the wheel, move the slider to the right for a swing to the Conservatives, or left for a swing to Labour.
As the slider moves, the pendulum on the wheel will swing at the same time, with the seats changing colour to the party gaining them.
Visit the 2005 swingometer – 2001 version no longer available
The BBC provided the artwork, we were commissioned to develop the interaction and animation model developing the assets into an interactive Flash application to be embedded into the BBC News website.
Flash interactive development